That wasn't my point, I mean its an unoriginal image with a reference not everybody gets.
Like I said, more recent uploads of this gif exist but haven't been tagged with 'corgi' or anything similar so I can't find them

There's a "boss neutral creature" that spawns around 15 minutes from starting the game (I think) that gives the team a special buff which power ups your character quite a lot, plus it gives the whole team extra gold. Usually during the lategame Baron is considered to be a key to victory so when the enemy eam is at the Baron, everyone tries to get there as quickly as they can so they cn either defend or secure it.

tl;dr It gives the team special buff that rapes the opposing team's butts.